Cats Or No Cats

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Have a built motor with a Magnacharger was wondering if cutting the cats out would help performance wise or just be loud and annoying?? Have magnaflow muffler dual 3 dual 3 out and that wyes to 3.5" believe that's factory..

[Krambo]

Personally, I would gut the cats in your case. Exhaust tone will change but too extreme. Be sure to modify your tune file to delete the rear O2 DTC's (for offroad only of course!) and to dial in your fueling.

[GMstrong]

Honestly if you dont need them delete them.Also if you dont have these already get some LTs and a good catback but i hate catbacks i always loved the sound and rumble from a dumped exhaust.I have true dual glasspacks dumped on my 9c1 Sounds great from idle-redline and a craaaazzzyy ass sound when i go under a over pass.

[stlavsa]

Whats a "built motor" and how much PSI are you running? I would imagine that even at a lower boost level the cats are holding you back a little. Personally I wouldnt "gut" the cats. Thats a good way to end up with a raspy, nasty sounding exhaust note.

 

Rather I would replace the cats with straight pipes, keeping the transitions the same size as the exhaust is going to not only help with sound but with exhaust evacuation as well.

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1213646[/url]']

Whats a "built motor" and how much PSI are you running? I would imagine that even at a lower boost level the cats are holding you back a little. Personally I wouldnt "gut" the cats. Thats a good way to end up with a raspy, nasty sounding exhaust note.

 

Rather I would replace the cats with straight pipes, keeping the transitions the same size as the exhaust is going to not only help with sound but with exhaust evacuation as well.

 

Its an aluminum block fully forged internals,mild cam, oilers, everything built by Katech performance. The supercharger is pushing 9-10lbs. And that's what I was thinking is replace them with straight pipe that way I'll still have cats if I ever need them.

[stlavsa]

1213646[/url]']

Whats a "built motor" and how much PSI are you running? I would imagine that even at a lower boost level the cats are holding you back a little. Personally I wouldnt "gut" the cats. Thats a good way to end up with a raspy, nasty sounding exhaust note.

 

Rather I would replace the cats with straight pipes, keeping the transitions the same size as the exhaust is going to not only help with sound but with exhaust evacuation as well.

 

Its an aluminum block fully forged internals,mild cam, oilers, everything built by Katech performance. The supercharger is pushing 9-10lbs. And that's what I was thinking is replace them with straight pipe that way I'll still have cats if I ever need them.

 

 

ya u should do it. You will need to make sure the secondary O2s are disabled in your tune.